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DayFromYear.js 323B

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  1. 'use strict';
  2. var GetIntrinsic = require('../GetIntrinsic');
  3. var $floor = GetIntrinsic('%Math.floor%');
  4. // https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3
  5. module.exports = function DayFromYear(y) {
  6. return (365 * (y - 1970)) + $floor((y - 1969) / 4) - $floor((y - 1901) / 100) + $floor((y - 1601) / 400);
  7. };